Name:	ruby_LesseeOperatingSubleaseFutureMinimumPaymentsReceivableAbstract
Namespace Prefix:	ruby_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Future rental payments receivable within the third year from the balance sheet date under an operating sub lease of lessee.

No definition available.

Name:	ruby_LesseeOperatingSubleaseFutureMinimumPaymentsReceivableInThreeYears
Namespace Prefix:	ruby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Future rental payments receivable within the second year from the balance sheet date under an operating sub lease of lessee.

No definition available.

Name:	ruby_LesseeOperatingSubleaseFutureMinimumPaymentsReceivableInTwoYears
Namespace Prefix:	ruby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of required minimum rental payments receivable in the remainder of the fiscal year following the latest fiscal year ended for operating sub leases of lessee having an initial or remaining non-cancelable letter-terms in excess of one year.

No definition available.

Name:	ruby_LesseeOperatingSubleaseFutureMinimumPaymentsReceivableRemainderOfFiscalYear
Namespace Prefix:	ruby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	us-gaap_LesseeOperatingSubleaseDescriptionAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Indicates (true false) whether sublessee has option to extend operating sublease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980